<?php
namespace ZHMVC\B\TOOL;

class Ftp
{
    /**
     * 仿写CodeIgniter的FTP类
     * FTP基本操作：
     * 1) 登陆; connect
     * 2) 当前目录文件列表; filelist
     * 3) 目录改变; chgdir
     * 4) 重命名/移动; rename
     * 5) 创建文件夹; mkdir
     * 6) 删除; delete_dir/delete_file
     * 7) 上传; upload
     * 8) 下载 download
     *
     */
    
    /*
     $config = array(
     'hostname' => '116.255.188.238',
     'username' => 'lvxiaoqiang',
     'password' => 'kkjatxk123',
     'port' => 21
     );
     $ftp = new Ftp();
     $ftp->connect($config);
     //$ftp->filelist('/wwwroot');//列表
     //$ftp->download('/wwwroot/jiekou.php','./jiekou.php');//下载
     //$ftp->upload('./jiekou.bak.php','/wwwroot/jiekou.bak.php');//上传
     //$ftp->mkdir('/wwwroot/testxiaoqiang');//创建目录
     //$ftp->rename('/wwwroot/testxiaoqiang','/wwwroot/testxx',false);//重命名
     //$ftp->rename('/wwwroot/testxx','/wwwroot/js/testxx',true);//移动
     $ftp->delete_dir('/wwwroot/js/testxx');//删除目录
     $ftp->delete_file('/wwwroot/jiekou.bak.php');//删除文件
     $ftp->close();
     */
    private $hostname = '';
    private $username = '';
    private $password = '';
    private $port = 21;
    private $passive = true;
    private $debug = true;
    private $conn_id = false;
    
    /**
     * 构造函数
     *
     * @param array $ 配置数组 : $config = array('hostname'=>'','username'=>'','password'=>'','port'=>''...);
     */
    public function  __construct($config = array())
    {
        if (count($config) > 0)
        {
            $this->_init($config);
        }
    }
    
    /**
     * FTP连接
     *
     * @access public
     * @param array $ 配置数组
     * @return  boolean
     */
    public function  connect($config = array())
    {
        if (count($config) > 0)
        {
            $this->_init($config);
        }
        
        if (false === ($this->conn_id = @ftp_connect($this->hostname, $this->port)))
        {
            if ($this->debug === true)
            {
                $this->_error("FTP链接失败");
            }
            return FALSE;
        }
        
        if (!$this->_login())
        {
            if ($this->debug === true)
            {
                $this->_error("FTP无法登录");
            }
            return FALSE;
        }
        
        if ($this->passive === true)
        {
            ftp_pasv($this->conn_id, true);
        }
        
        return TRUE;
    }
    
    /**
     * 目录改变
     *
     * @access public
     * @param string $ 目录标识(ftp)
     * @param boolean $
     * @return  boolean
     */
    public function  chgdir($path = '', $supress_debug = false)
    {
        if ($path == '' OR !$this->_isconn())
        {
            return FALSE;
        }
        
        $result = @ftp_chdir($this->conn_id, $path);
        
        if ($result === false)
        {
            if ($this->debug === true AND $supress_debug == false)
            {
                $this->_error("FTP无法改变:dir[" . $path . "]");
            }
            return FALSE;
        }
        
        return TRUE;
    }
    
    /**
     * 目录生成
     *
     * @access public
     * @param string $ 目录标识(ftp)
     * @param int $ 文件权限列表
     * @return  boolean
     */
    public function  mkdir($path = '', $permissions = null)
    {
        if ($path == '' OR !$this->_isconn())
        {
            return FALSE;
        }
        
        $result = @ftp_mkdir($this->conn_id, $path);
        
        if ($result === false)
        {
            if ($this->debug === true)
            {
                $this->_error("FTP无法创建:dir[" . $path . "]");
            }
            return FALSE;
        }
        
        if (!is_null($permissions))
        {
            $this->chmod($path, (int)$permissions);
        }
        
        return TRUE;
    }
    
    /**
     * 上传
     *
     * @access public
     * @param string $ 本地目录标识
     * @param string $ 远程目录标识(ftp)
     * @param string $ 上传模式 auto || ascii
     * @param int $ 上传后的文件权限列表
     * @return  boolean
     */
    public function  upload($localpath, $remotepath, $mode = 'auto', $permissions = null)
    {
        if (!$this->_isconn())
        {
            return FALSE;
        }
        
        if (!file_exists($localpath))
        {
            if ($this->debug === true)
            {
                $this->_error("FTP没有源文件:" . $localpath);
            }
            return FALSE;
        }
        
        if ($mode == 'auto')
        {
            $ext = $this->_getext($localpath);
            $mode = $this->_settype($ext);
        }
        
        $mode = ($mode == 'ascii') ? FTP_ASCII : FTP_BINARY;
        
        $result = @ftp_put($this->conn_id, $remotepath, $localpath, $mode);
        
        if ($result === false)
        {
            if ($this->debug === true)
            {
                $this->_error("FTP无法上传:远程目录[" . $localpath . "]/本地目录[" . $remotepath . "]");
            }
            return FALSE;
        }
        
        if (!is_null($permissions))
        {
            $this->chmod($remotepath, (int)$permissions);
        }
        
        return TRUE;
    }
    
    /**
     * 下载
     *
     * @access public
     * @param string $ 远程目录标识(ftp)
     * @param string $ 本地目录标识
     * @param string $ 下载模式 auto || ascii
     * @return  boolean
     */
    public function  download($remotepath, $localpath, $mode = 'auto')
    {
        if (!$this->_isconn())
        {
            return FALSE;
        }
        
        if ($mode == 'auto')
        {
            $ext = $this->_getext($remotepath);
            $mode = $this->_settype($ext);
        }
        
        $mode = ($mode == 'ascii') ? FTP_ASCII : FTP_BINARY;
        
        $result = @ftp_get($this->conn_id, $localpath, $remotepath, $mode);
        
        if ($result === false)
        {
            if ($this->debug === true)
            {
                $this->_error("FTP无法下载:本地目录[" . $localpath . "]-远程目录[" . $remotepath . "]");
            }
            return FALSE;
        }
        
        return TRUE;
    }
    
    /**
     * 重命名/移动
     *
     * @access public
     * @param string $ 远程目录标识(ftp)
     * @param string $ 新目录标识
     * @param boolean $ 判断是重命名(FALSE)还是移动(TRUE)
     * @return  boolean
     */
    public function  rename($oldname, $newname, $move = false)
    {
        if (!$this->_isconn())
        {
            return FALSE;
        }
        
        $result = @ftp_rename($this->conn_id, $oldname, $newname);
        
        if ($result === false)
        {
            if ($this->debug === true)
            {
                $msg = ($move == false) ? "FTP无法重命名":"FTP无法移动";
                $this->_error($msg);
            }
            return FALSE;
        }
        
        return TRUE;
    }
    
    /**
     * 删除文件
     *
     * @access public
     * @param string $ 文件标识(ftp)
     * @return  boolean
     */
    public function  delete_file($file)
    {
        if (!$this->_isconn())
        {
            return FALSE;
        }
        
        $result = @ftp_delete($this->conn_id, $file);
        
        if ($result === false)
        {
            if ($this->debug === true)
            {
                $this->_error("FTP无法删除文件:file[" . $file . "]");
            }
            return FALSE;
        }
        
        return TRUE;
    }
    
    /**
     * 删除文件夹
     *
     * @access public
     * @param string $ 目录标识(ftp)
     * @return  boolean
     */
    public function  delete_dir($path)
    {
        if (!$this->_isconn())
        {
            return FALSE;
        }
        // 对目录宏的'/'字符添加反斜杠'\'
        $path = preg_replace("/(.+?)\/*$/", "\\1/", $path);
        // 获取目录文件列表
        $filelist = $this->filelist($path);
        
        if ($filelist !== false AND count($filelist) > 0)
        {
            foreach($filelist as $item)
            {
                // 如果我们无法删除,那么就可能是一个文件夹
                // 所以我们递归调用delete_dir()
                if (! @delete_file($item))
                {
                    $this->delete_dir($item);
                }
            }
        }
        // 删除文件夹(空文件夹)
        $result = @ftp_rmdir($this->conn_id, $path);
        
        if ($result === false)
        {
            if ($this->debug === true)
            {
                $this->_error("FTP无法删除目录:dir[" . $path . "]");
            }
            return FALSE;
        }
        
        return TRUE;
    }
    
    /**
     * 修改文件权限
     *
     * @accesspublic
     * @param string $ 目录标识(ftp)
     * @return boolean
     */
    public function  chmod($path, $perm)
    {
        if (!$this->_isconn())
        {
            return FALSE;
        }
        // 只有在PHP5中才定义了修改权限的函数(ftp)
        if (! function_exists('ftp_chmod'))
        {
            if ($this->debug === true)
            {
                $this->_error("FTP无法更改权限(function )");
            }
            return FALSE;
        }
        
        $result = @ftp_chmod($this->conn_id, $perm, $path);
        
        if ($result === false)
        {
            if ($this->debug === true)
            {
                $this->_error("FTP无法更改:路径[" . $path . "]-权限[" . $perm . "]");
            }
            return FALSE;
        }
        return TRUE;
    }
    
    /**
     * 获取目录文件列表
     *
     * @access public
     * @param string $ 目录标识(ftp)
     * @return  array
     */
    public function  filelist($path = '.')
    {
        if (!$this->_isconn())
        {
            return FALSE;
        }
        
        return ftp_nlist($this->conn_id, $path);
    }
    
    /**
     * 关闭FTP
     *
     * @access public
     * @return  boolean
     */
    public function  close()
    {
        if (!$this->_isconn())
        {
            return FALSE;
        }
        
        return @ftp_close($this->conn_id);
    }
    
    /**
     * FTP成员变量初始化
     *
     * @access private
     * @param array $ 配置数组
     * @return  void
     */
    private function  _init($config = array())
    {
        foreach($config as $key => $val)
        {
            if (isset($this->$key))
            {
                $this->$key = $val;
            }
        }
        // 特殊字符过滤
        $this->hostname = preg_replace('|.+?://|', '', $this->hostname);
    }
    
    /**
     * FTP登陆
     *
     * @access private
     * @return  boolean
     */
    private function  _login()
    {
        return @ftp_login($this->conn_id, $this->username, $this->password);
    }
    
    /**
     * 判断con_id
     *
     * @access private
     * @return  boolean
     */
    private function  _isconn()
    {
        if (!is_resource($this->conn_id))
        {
            if ($this->debug === true)
            {
                $this->_error("FTP没有连接");
            }
            return FALSE;
        }
        return TRUE;
    }
    
    /**
     * 从文件名中获取后缀扩展
     *
     * @access private
     * @param string $ 目录标识
     * @return  string
     */
    private function _getext($filename)
    {
        if (false === strpos($filename, '.'))
        {
            return 'txt';
        }
        
        $extarr = explode('.', $filename);
        return end($extarr);
    }
    
    /**
     * 从后缀扩展定义FTP传输模式 ascii 或 binary
     *
     * @access private
     * @param string $ 后缀扩展
     * @return  string
     */
    private function _settype($ext)
    {
        $text_type = array(
            'txt',
            'text',
            'php',
            'phps',
            'php4',
            'js',
            'css',
            'htm',
            'html',
            'phtml',
            'shtml',
            'log',
            'xml'
        );
        
        return (in_array($ext, $text_type)) ? 'ascii':'binary';
    }
    
    /**
     * 错误日志记录
     *
     * @access prvate
     * @return  boolean
     */
    private function _error($msg)
    {
        return @file_put_contents('./ftp_err.log', "date[" . date("Y-m-d H:i:s") . "]-hostname[" . $this->hostname . "]-username[" . $this->username . "]-password[" . $this->password . "]-msg[" . $msg . "]\n", FILE_APPEND);
    } 
}

